Hello,
What does iPojo do if an active component (one running a thread) tries
to access a service dependency that is not currently available? Does it
cause the call to the dependency to throw something like
ServiceUnavailableException? I.e. are the dependencies proxied or are
they the raw
Clement Escoffier wrote:
When a thread try to use a temporal dependency...
You mean a thread simply uses the reference stored in the respective
component field to make a call to the dependency object? I.e. I can
count on temporal dependencies to never be null. I.e. you do proxy the
Hello,
I was wondering what is iPojo's mission in life: just to make it a bit
easier to code in OSGi or the grand idea to lift the Java language to a
higher abstraction. This philosophical question is important to me
because iPojo like most other DI frameworks seems highly viral.
For example
Richard S. Hall wrote:
Yes, this is an open-ended question and there is likely no single answer.
The mission of iPOJO is to make creating dynamic applications simpler.
Precisely how you use it to accomplish this depends on your use case.
The main debate, it seems, is when to use an object
I suppose I am looking at iPojo from the perspective of Guice and
PicoContainer. The first tries to replace all object construction, while
the second tries to do that and on top of it manage the subsequent
lifecycle of objects. Still both of them operate within the usual OO
paradigm. They just
Hello,
I plan to use iPojo on an OSGi framework different from Felix. So:
1) Will the iPojo bundles work on a generic OSGi 4.2 + service compendium
environment?
2) Is it possible to port the arch console command to another console
interface? Or alternatively
is there some iPojo introspection
clement escoffier wrote:
That is not directly possible. However, you can do this as following:
public class ConsumerImpl {
// Temporal dependency on FooService
FooService fs;
// An helper object
ConsumerHelper helper;
public ConsumerImpl() {
helper = new
Hello,
I need to use iPojo outside of Felix. So:
1) Will the iPojo bundles work on a generic OSGi 4.2 framework + the standard
service compendium?
2) Is there a way for me to use the arch command in such a setting?
Regards,
Todor
clement escoffier wrote:
That is not directly possible. However, you can do this as following:
public class ConsumerImpl {
// Temporal dependency on FooService
FooService fs;
// An helper object
ConsumerHelper helper;
public ConsumerImpl() {
helper = new
Hello,
I managed to make my pojo appear to be constructor injected like so:
@Component(name = HelloClient, immediate = true)
public class HelloClient {
@Property
private final int delay;
@Requires
private final Hello[] hello;
private Thread thread;
private boolean running;
Richard S. Hall wrote:
When a thread enters the POJO, it creates a copy of any services
the thread uses until the thread exits the POJO (even if the thread
calls out from the POJO and re-enters it). When the thread makes a
request for a service it always gets the same copy, so the thread
It would be nice to have an annotation like this
@Handler(name=test, namespace=com.acme.test)
public class TestHandler extends PrimitiveHandler {
...
}
or maybe even
@Handler(annotation=Test.class)
public class TestHandler extends PrimitiveHandler {
...
}
@Test(attribute1=val1,
William Drew wrote:
I am looking for some guidance on best practices or well known approaches to
building OSGi “enabled” applications. Currently I have an application that
is started from the command line calling a class with a static main().
Ø java –classpath whatever
Hello,
How do you validate the felix framework? I could not find testing code in
http://svn.apache.org/repos/asf/felix/trunk/framework.
Do you just run the OSGi TCK?
Cheers,
Todor
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For
Hello,
Is there a way for me to instruct the iPojo maven plugin to consume the
iPojo metadata directly from the my pom.xml. In this way I can have both
my BND and iPojo configuration in the same place.
Cheers,
Todor
-
To
The synchronous event delivery is an attempt to make service
unregistration more graceful. This is the only way to provide an
'unregistering' event as opposed to 'unregistered'. E.g. when you
receive the event the service is still up and you can gracefully stop
using it. So before the call to
Tim,
Maybe your should check out the peaberry project.
http://code.google.com/p/peaberry/
It is service layer agnostic and already comes with implementations for OSGi and
Eclipse. All you need to do is implement ServiceRegistry for your stand alone
use case and maybe you could reuse your
Hello,
Seems I have been chewing on the service dynamics issue forever. Just as I
though I got a workable concept about tracking and releasing services I stumble
on a contradicting concept. The problem is this:
According to my understanding it is not acceptable importer behavior to ever
call
Richard S. Hall wrote:
Yes. iPOJO is of the philosophy that service departures will likely lead
to errors, so you are better off being prepared to catch them and fail
gracefully, sort of like errors in distributed computing. Even if you
hold a dedicated lock, there is no guarantee that
Todor Boev wrote:
Richard S. Hall wrote:
Yes. iPOJO is of the philosophy that service departures will likely lead
to errors, so you are better off being prepared to catch them and fail
gracefully, sort of like errors in distributed computing. Even if you
hold a dedicated lock
nope - peaberry doesn't hold any locks during the actual service call, it
only
has a small amount of synchronization to properly manage internal records
when setting up and tearing down a service call
Yup. I figured that would be the case after Richard's replay. Now the lock
holding mode
This continues the correct service import behavior thread. I want to discuss
the flip side of the coin - how to properly export.
Currently there are two rules which I have not disputed (but maybe I should?):
- A bundle should mushroom into a runtime object structure when activated and
shrink
Dmitry Skavish wrote:
Hello all,
I am trying to understand the differences between those technologies, but I
could not find any article which compares all them side by side.
Can somebody summarize pros and cons or point me to page where this is
already done?
We are using Guice, so I guess the
This sentence I do not understand: Service dynamics is one of the key
points of OSGi.
The key usage of dynamics is hot code update. Direct service references plus
concurrent bundle updates make handling service dynamics quite disruptive to the
normal application code.You have to sprinkle
Todor Boev wrote:
Here's a descent comparison between Spring DM, OSGi DS and iPojo.
http://www.slideshare.net/heiko.seeberger/jax-09-osgi-service-components-models
I actually meant to post this here detailed three way comparison:
http://www.slideshare.net/njbartlett/component-oriented
Hi fellow OSGi enthusiasts,
I want to share with you a small article I wrote on deterministic vs fuzzy
bundle shutdown.
http://rinswind.blogspot.com/2009/06/shutdown-deterministic-vs-fuzzy.html
It is a follow up on a much larger article about service dynamics but I tried to
make it worth reading
Charles Moulliard wrote:
Neil,
Thanks for the clarification. The idea that I promote behind my reply is not
at all to debate which approach is better than the other but instead to make
aware the opensource community that too much frameworks kill our
goals/intents. The merit of EJB specification
Neil Bartlett wrote:
Charles,
It was the evolution of Spring *outside* the EJB specifications that
gave EJB the required impetus to improve. Likewise the existence of
other component models outside of Blueprint and DS is useful to allow
them to experiment with new ideas and potentially
Guillaume Nodet wrote:
I agree with most what you said.
But when it comes to build an application, you can't really have your
developers learn 3 different ways of doing the same thing, you kinda
have to choose one and stick with it.
I guess that's Charles' main concern here, because it's not
There are many ambiguities here. At least to me :) Some notes:
1) So every Function implementation represents some formula like this?
FunctionA() = call B + call C
2) And you want to set B and C before you call A?
3) You have multiple instances identified with the same (name, version) pair?
Lars Fischer wrote:
This is what I'm asking for. I have not used OSGi before, so I have no
experiences how to implement the dynamic retrieving of functions in a
good way and how to get the system stable.
If the retriever is an OSGi service and it uses the
There is no well defined time.
A class loader is garbage collected just like any other object. I.e. when there
are no direct strong references to it. Objects refer to their reflective Class
objects. And each Class object refers to the ClassLoader that *defined* it from
raw bytes.
When you
In the [3] link in your message the guy has tried this:
xStream.setClassLoader(Thread.currentThread().getContextClassLoader());
Instead he should have tried this
xStream.setClassLoader(getClass().getClassLoader());
The idea is to tell xStream to load classes from your own class loader, aka
Guido Spadotto wrote:
Another guy claimed he solved this issue [1], but I won't believe until
I see it running.
...
[1]:
http://archive.timeindexing.codehaus.org/lists/org.codehaus.xstream.user/msg/19183331.p...@talk.nabble.com
On second though I think this wrapper function should work
Hi,
Has anyone contemplated the idea for a validation step after a bundle's manifest
is generated?
E.g. check if only exported packages are imported. It seems BND already detects
OSGi manifests on the classpath to collect version information for the imports.
So the manifests of all jars on the
You might want to check this equinox page for detailed info on the problem:
http://wiki.eclipse.org/index.php/Context_Class_Loader_Enhancements
Generally speaking the context loader seems to be a not-that-trivial problem.
-
To
Configuring loggers through ConfigAdmin creates a bootstrap problem:
You won't get logs until ConfgAdmin is up. It however can also log. Even if
this is not the case you have to find a way to handle logs in the window
between framework startup and log configuration.
One way is to do an initial
of properties rather
than the logback xml...
On Thu, Jul 12, 2018 at 11:18 AM Todor Boev wrote:
> Configuring loggers through ConfigAdmin creates a bootstrap problem:
> You won't get logs until ConfgAdmin is up. It however can also log. Even
> if this is not the case you have to find a way to ha
Hello,
Can we add a "bundle" command to gogo that will list a readable summary for
a target bundle?
Calling BundleContext.getBundle() and looking at the raw object print is
almost useless.
Also is there any reason this was not done until now?
Regards,
Todor
he output of the lb command doesn't
> look
> > terrible. It seems to lack an implementation for the INSPECT level
> however.
> >
> > Regards,
> > Neil
> >
> > On Tue, Nov 13, 2018 at 9:38 AM Todor Boev wrote:
> >
> >> Hello,
> >>
> &
ends Map>"
just to workaround erasure.
But then I better export my type too ..or not?
On Fri, Jan 18, 2019 at 5:53 PM Raymond Auge
wrote:
> On Fri, Jan 18, 2019 at 10:39 AM Todor Boev wrote:
>
> > Ok, but the formatter doesn't always do what I want.
> >
> > Right now
ion is to avoid using sys.out/err whenever possible.
>
> - Ray
>
> On Fri, Jan 18, 2019 at 9:53 AM Todor Boev wrote:
>
> > Hi,
> >
> > When implementing a Gogo shell command are there any rules of thumb on
> > whether I should return a result from the command
Hi,
When implementing a Gogo shell command are there any rules of thumb on
whether I should return a result from the command method or print it on
System.out? Possibly using the CommandSession to format it first.
What bothers me is that AFAIK the automatic printing of return values from
command
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